What is the purpose of the flue in a combustion system?

The purpose of the flue in a combustion system is to contain heat and by-products of combustion. A flue serves as a passageway for exhaust gases that result from the combustion process, directing these gases safely out of the building or living space. This is vital for maintaining air quality and ensuring that harmful by-products, such as carbon monoxide, do not accumulate indoors.

Additionally, the flue helps manage the temperature of the exhaust materials, which contributes to the efficiency of the system by allowing it to operate within a safe and optimal temperature range. Properly functioning flues are critical for the effective removal of exhaust gases, protecting both the appliance and the occupants of the space.